/*
 *  Copyright 2005 Blandware (http://www.blandware.com)
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package com.blandware.atleap.webapp.action.forum.topic;

import com.blandware.atleap.webapp.action.core.BaseAction;
import com.blandware.atleap.webapp.util.forum.ForumModuleWebConstants;
import com.blandware.atleap.webapp.util.forum.ForumModuleWebUtil;
import com.blandware.atleap.service.forum.ForumManager;
import com.blandware.atleap.common.ForumModuleConstants;
import com.blandware.atleap.model.forum.Forum;
import org.apache.struts.action.*;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.util.List;

/**
 * <p>Shows a form for topic creation.</p>
 * <p><a href="CallCreateTopicAction.java.html"><i>View source</i></a></p>
 *
 * @author Roman Puchkovskiy <a href="mailto:roman.puchkovskiy@blandware.com">
 *         &lt;roman.puchkovskiy@blandware.com&gt;</a>
 * @version $Revision: 1.3 $ $Date: 2006/06/15 10:52:43 $
 * @struts.action path="/forum/topic/callCreate"
 * name="topicForm"
 * validate="false"
 * @struts.action-forward name="createTopic"
 * path=".forum.topic.create"
 * @struts.action-forward name="showForums"
 * path="/forum/forum/showForums.do"
 * redirect="true"
 * @struts.action-forward name="showForum"
 * path="/forum/forum/show.do"
 * redirect="true"
 */
public final class CallCreateTopicAction extends BaseAction {
	/**
	 * @param mapping  The ActionMapping used to select this instance
	 * @param form     The optional ActionForm bean for this request (if any)
	 * @param request  The HTTP request we are proceeding
	 * @param response The HTTP response we are creating
	 * @return an ActionForward instance describing where and how
	 *         control should be forwarded, or null if response
	 *         has already been completed
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
	                             HttpServletRequest request,
                                 HttpServletResponse response) {

        HttpSession session = request.getSession();

        Long forumId = null;
        forumId = (Long) session.getAttribute(ForumModuleWebConstants.FORUM_ID_KEY);

        if (forumId == null) {
            // no forum ID
            if (log.isDebugEnabled()) {
                log.debug("No forum ID was found while tried to create a topic; going back to forums");
            }
            return mapping.findForward("showForums");
        }

        ForumManager forumManager = (ForumManager) getBean(ForumModuleConstants.FORUM_MANAGER_BEAN);
        Forum forum = forumManager.retrieveForum(forumId);
        if (forum == null) {
            // no forum found
            ActionMessages errors = new ActionMessages();
            errors.add("ownerNotFound", new ActionMessage("forum.topic.errors.ownerNotFound"));
            saveErrors(request, errors);
            return mapping.findForward("showForums");
        }

        List forums = ForumModuleWebUtil.getForumParentsList(forum,
                                                             forumManager);
        session.setAttribute(ForumModuleWebConstants.FORUM_PARENTS_LIST_KEY,
                             forums);
        session.removeAttribute(ForumModuleWebConstants.PARENT_TOPIC_KEY);

        request.setAttribute("previewing", Boolean.FALSE);
        request.setAttribute("fullName", null);
        request.setAttribute("preparedBody", "");

		// save transaction token in request
		saveToken(request);
		return mapping.findForward("createTopic");
	}
}
